Exit taxes compared: what it actually costs to leave, country by country

Renouncing residency, handing back a passport, or simply moving your life and business to a new jurisdiction can trigger a tax bill you never expected. For founders and high-net-worth individuals with significant equity, the cost of leaving a country is not always obvious from the headline tax rate. Some governments treat your departure as a sale of everything you own, taxing unrealised gains on the day you pack your bags. Others have no formal exit charge but lay traps that catch you years later. The differences between jurisdictions are enormous: a founder with £5 million in unrealised gains could owe nothing in one country and face a six-figure bill in another, depending entirely on where they are leaving from and how long they have been resident. This comparison, current as of mid-2026, sets out the mechanisms country by country so you can see the real exposure before you commit to a move. Thresholds, rates and rules change; every figure here should be confirmed with a qualified adviser in the relevant jurisdiction before you act.

What an exit tax actually is, and what it is not

An exit tax is a charge imposed by a country when a taxpayer ceases to be a tax resident or renounces citizenship. The typical mechanism is a deemed disposal: the government treats all (or most) of your assets as if you sold them at fair market value on the day you leave, and taxes the resulting gain. You have not actually sold anything, but you owe tax on the paper profit.

This is different from a standard capital gains tax, which only fires on a real sale. It is also different from a withholding tax on dividends or a transfer tax on property. The purpose is to stop residents from accumulating gains under a country's tax system and then moving somewhere with a lower rate before crystallising those gains. Not every country has one. Several major economies rely on anti-avoidance rules instead, which can be just as costly but operate through a different mechanism entirely.

The countries now taxing your departure

The list of countries with some form of departure charge has grown steadily. Canada, Norway, the Netherlands, the United States, France, Germany, Spain, Denmark, South Africa and Australia all impose a tax or deemed disposal event when you leave. The severity varies wildly.

Canada and Norway apply a broad deemed disposal across most asset classes. The US targets only "covered expatriates" who renounce citizenship or long-term residency. France and Germany focus on significant shareholdings. Australia triggers a deemed CGT event on your non-Australian-property assets, which for most founders include their own company shares, when you cease residency. The trend is clear: more countries are closing the door on tax-free departures, and the rules are becoming more aggressive. If you hold founder equity or substantial investments, assume your country of residence has something in place until you have confirmed otherwise.

United Kingdom: no exit charge, but real traps

The UK does not impose a general capital gains exit tax on departure. You can leave, become non-resident under the Statutory Residence Test, and sell assets abroad without a UK CGT bill. That headline fact leads many founders to assume the UK is a clean break. It is not.

The first trap is the temporary non-residence rule. If you leave for fewer than five complete UK tax years, certain gains and income realised while you were away are taxed as if you never left, assessed on your return. The second trap is inheritance tax. Under the new residence-based IHT regime, your worldwide estate can remain within scope for years after departure. The third is the Business Property Relief cap introduced from April 2026: full relief applies to the first £1 million of qualifying business assets, with only 50 per cent relief above that threshold. For a founder with a £10 million business, that cap creates a significant IHT exposure that did not exist before. None of these is an exit tax in the formal sense, but the financial effect can be just as painful.

Australia: the 2026 overhaul that doubles a founder exit

Australia already had a deemed disposal rule: CGT event I1 triggers when you cease Australian residency, treating your non-Australian-property assets, which for most founders include their own company shares, as sold at market value. You can elect to defer, but the liability follows you.

The 2026 Budget changes make things considerably worse for founders. The 50 per cent CGT discount is being removed for assets acquired after Budget night, effective 1 July 2027, replaced by an inflation-indexed cost base model. On top of that, a 30 per cent minimum tax on capital gains and trust distributions means the effective rate on a large founder exit can roughly double compared with the old regime. A founder selling $20 million in shares under the previous rules might have faced an effective rate around 23-24 per cent; under the new structure, the effective rate can approach 45 per cent or higher depending on the holding period and inflation adjustment. If you are an Australian-resident founder planning a liquidity event, the timing of your departure relative to these changes is critical.

Canada: a genuine departure tax on the day you leave

Canada operates one of the clearest departure taxes in the world. On the day you cease Canadian residency, you are deemed to have disposed of most of your assets at fair market value. The resulting gain is included in your income at the standard 50 per cent inclusion rate and taxed at your marginal rate. You report it on form T1161.

Certain assets are excluded: Canadian real property, registered retirement accounts and some business property that remains connected to a Canadian permanent establishment. Everything else is in scope, including shares in private companies, public equities and foreign property. For a founder holding $15 million in private company shares with a nominal cost base, the deemed disposition generates a taxable capital gain of $7.5 million (at 50 per cent inclusion), which at the top federal-provincial rate can produce a bill north of $3 million. Canada does allow security to be posted in lieu of immediate payment in some cases, but the liability is real and enforceable.

Norway and the Netherlands: taxing gains you have not realised

Norway charges a 37.84 per cent tax on unrealised gains above NOK 3 million when you emigrate. This applies to shares, fund units and other financial instruments. The tax is not forgiven if you move to another EEA country, though payment can be deferred under certain conditions. The rate is among the highest in Europe, and the threshold is low enough to catch most founders.

The Netherlands is moving its Box 3 regime to tax both realised and unrealised gains at 36 per cent. Separately, departing shareholders who hold 5 per cent or more of a company face a deemed disposal. The Dutch system has historically been complex, and the transition to the new regime is creating uncertainty around timing and valuations. Both countries are aggressive in this area, and founders holding significant equity should model the cost of departure well before committing to a timeline.

The United States, France and Germany, in brief

The US applies its exit tax under Section 877A to "covered expatriates": citizens who renounce and long-term residents (green card holders for eight or more of the prior fifteen years) who meet certain net worth or tax liability thresholds. The mechanism is a mark-to-market deemed sale of worldwide assets, with an exclusion amount that is indexed annually for inflation (around US$900,000). Gains above that are taxed at ordinary rates.

France taxes departing shareholders who hold at least 50 per cent of a company (or holdings worth more than €800,000) on unrealised gains, though payment can be deferred within the EU/EEA. Germany imposes a similar charge on shareholders holding 1 per cent or more of a corporation, with a deemed disposal at the point of emigration. Both countries allow deferrals and instalment payments in certain circumstances, but the underlying liability exists and must be planned for.

Where the exit tax is zero: the UAE and the other landings

The UAE charges no personal income tax, no capital gains tax and no departure tax of any kind. You can build a business, realise gains and relocate again without a UAE tax bill. This is the core of its appeal for founders and investors structuring a move from a high-tax jurisdiction.

Other low-charge destinations include Singapore (no capital gains tax, no exit charge), certain Swiss cantons offering lump-sum taxation for qualifying individuals, and Italy's flat-tax regime for new residents (€200,000 per year on foreign income, with no exit charge). The key for any of these landings is ensuring genuine substance: physical presence, real decision-making, local ties. A poorly planned relocation that lacks substance will not survive scrutiny from the country you left. Cosmos works with founders planning these moves, coordinating the residency structuring and ensuring the commercial reality matches the paperwork, with regulated filings handled by licensed local partners in each jurisdiction.

Planning a move without walking into a charge

The single most expensive mistake is moving before you understand the exit cost. A well-planned relocation sequences events carefully: establishing genuine residency in the destination country, meeting the departure requirements of the origin country, and timing any liquidity events to fall in the right tax year.

• Confirm your country's deemed disposal rules and any holding periods or deferral elections before you set a departure date.
• Model the tax cost at current valuations, not the valuations you hope for after a future funding round.
• Ensure you meet the minimum absence period in your origin country (five full UK tax years, for example) to avoid clawback rules.
• Build genuine substance in your new jurisdiction: lease, utility bills, local bank accounts, board meetings held locally.
• Engage qualified advisers in both the origin and destination countries; Cosmos can coordinate this across jurisdictions through its network of licensed partners.

A founder who moves to the UAE but continues to run board meetings from London, keeps their family enrolled in UK schools and flies back every month is not going to satisfy HMRC's Statutory Residence Test. Substance is not optional.

Frequently asked questions

Can I avoid an exit tax by moving to a treaty country? Tax treaties can reduce or defer the charge in some cases, particularly within the EU/EEA. They do not eliminate the underlying liability. Treaty relief depends on the specific provisions between the two countries, and you need professional advice on the interaction.

Does the UAE have any form of departure tax? No. The UAE imposes no personal income tax, no capital gains tax and no charge on leaving. There is a corporate tax on business profits (9 per cent above AED 375,000, with a narrower 0 per cent rate for qualifying free-zone income), but no personal exit charge.

How long do I need to be away from the UK to avoid the temporary non-residence rules? You must be non-resident for at least five complete UK tax years. If you return before that, gains and certain income realised while abroad are taxed as if you had remained UK resident throughout.

Is an exit tax the same as a departure tax at the airport? No. An airport departure tax is a small fee on your plane ticket. A tax on departure from residency is a charge on your accumulated wealth or gains, and can run into millions.

The cost of leaving a country is one of the most consequential financial decisions a founder or investor will make, and it is almost always underestimated. Rules are tightening across major economies, and the window for tax-efficient relocation narrows every budget cycle. If you are considering a move, start the analysis early: model the numbers, build genuine substance in your destination, and work with advisers who understand both sides of the border. Cosmos helps founders structure these transitions, coordinating across jurisdictions so the move holds up under scrutiny. Every figure cited here reflects 2026 rules and should be verified with a qualified tax adviser before you act.

This is general information, not tax advice. Exit-tax and departure-tax rules differ by country and change frequently; confirm your position with a qualified adviser in the relevant jurisdiction before acting.